Category: 112-63-0

Akazome, Motohiro; Takahashi, Toshiaki; Ogura, Katsuyuki published the artcile< Enantiomeric Inclusion of α-Hydroxy Esters by (R)-(1-Naphthyl)glycyl-(R)-phenylglycine and the Crystal Structures of the Inclusion Cavities>, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is enantioselective inclusion hydroxy ester naphthylglycylphenylglycine; stereoselective crystallization hydroxy ester naphthylglycylphenylglycine; crystal structure hydroxy ester naphthylglycylphenylglycine inclusion complex; hydrogen bond hydroxy ester naphthylglycylphenylglycine inclusion complex.

A simple dipeptide, (R)-(1-naphthyl)glycyl-(R)-phenylglycine [(R,R)-I], formed inclusion compounds with several α-hydroxy esters with high enantioselectivity. By crystallization of a mixture of the dipeptide I and racemic MeCH(OH)CO2Me [(RS)-II] from methanol, asym. recognition occurred to give an inclusion compound that contains S-II in 89% ee. X-ray crystallog. study of the inclusion compound elucidated that the dipeptide mols. arrange in a “”folded antiparallel”” β-sheetlike structure to accommodate the α-hydroxy ester in the pocket-type cavity surrounded by naphthyl and Ph groups on the sheet. Similarly, MeCH(OH)CO2Et and dihydro-3-hydroxy-4,4-dimethyl-2(3H)-furanone were included with high enantioselectivity of the S form. When bulkier Me3CCH(OH)CO2Me was used as a guest mol., the arrangement of dipeptide mols. changed to an “”extended antiparallel”” mode, where the naphthyl and Ph groups arranged in a “”parallel stacked and displaced”” mode and a channel-type cavity was constructed. The guest mols. were accommodated via hydrogen bonding in the channel-type cavity with high enantioselectivity of the S form (82% ee). In the case of Me2CHCH(OH)CO2Me [(RS)-III], optically pure (S)-III formed the dipeptide sheet with the “”folded antiparallel”” structure by cocrystn. with I, while the “”extended antiparallel”” structure appeared in the inclusion of (RS)-III.

Journal of Organic Chemistry published new progress about Crystal structure. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Sasaki, Jun-ichi; Kobayashi, Makoto; Ibe, Yusuke; Nishino, Hiroshi published the artcile< Mn(III)-based oxidative radical ring-expansion reaction using squarate derivatives: selective synthesis of bis(butenolide)s and the acetate monomers>, Product Details of C19H34O2, the main research area is bis butenolide preparation furanone cyclopentenedione crystal structure; aryl alkyl hydroxycyclobutenone oxidative radical ring expansion cyclization.

The Mn(III)-based oxidation of phenyl- and alkyl-substituted hydroxycyclobutenones selectively produced the bis(butenolide)s or the acetate monomers via the 5-endo radical cyclization depending upon the concentration of the reaction. A similar reaction of hydroxycyclobutenones bearing an alkenyl and alkynyl substituent did not produce any bis(butenolide)s or acetate monomers, but the 5-exo and 6-endo radical cyclization products including the unsaturated group. The oxidation of the hydroxycyclobutenones having an unsaturated substituent in the presence of alkenes afforded radical coupling products during the 5-exo radical cyclization. The reaction details, structure determination of the products, and the mechanism for the formation of the products are described.

Heterocycles published new progress about Crystal structure. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Product Details of C19H34O2.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Zuriarrain-Ocio, Andoni; Zuriarrain, Juan; Etxebeste, Oier; Duenas, Maria Teresa; Berregi, Inaki published the artcile< Evolution of main polyphenolics during cidermaking>, Category: esters-buliding-blocks, the main research area is polyphenol cidermaking.

This work reports the evolution of polyphenolic compounds content during the cidermaking process in the Basque Country (Northern Spain). Fourteen monovarietal musts were obtained throughout three seasons (13 different, one repeated) using different apple cultivars from the Basque Country. Monovarietal musts were used to cover a wide range of polyphenolic content and to introduce variability. These musts were fermented and matured to obtain 14 monovarietal ciders. The evolution of the musts was monitored during 6-8 mo by measuring the polyphenolic profile with an HPLC method throughout 4 or 5 samplings. Chlorogenic acid, 4-p-coumaroylquinic acid and (-)-epicatechin showed fluctuations during the alc. fermentation (10-40 days), followed by stabilization. With phloretin 2-O-xyloglucoside, an increase or a stable concentration was observed during the alc. fermentation followed by stabilization. Tyrosol, absent in the initial musts, showed an increase during the alc. fermentation and became stable afterwards. These were the only general patterns observed The rest of the phenolic compounds studied, such as procyanidin B1, procyanidin B2 and phloridzin, did not show any general evolution rule.

LWT–Food Science and Technology published new progress about Fermentation. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Category: esters-buliding-blocks.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Zhao, Yu; Wan, Haofang; Yang, Jiehong; Huang, Yan; He, Yu; Wan, Haitong; Li, Chang published the artcile< Ultrasound-assisted preparation of ,Ready-to-use, extracts from Radix Paeoniae Rubra with natural deep eutectic solvents and neuroprotectivity evaluation of the extracts against cerebral ischemic/ reperfusion injury>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is ischemic reperfusion injury ultrasound Radix deep eutectic solvent neuroprotectivity; Galloyl paeoniflorin; Ischemic/ reperfusion injury; Natural eutectic solvent; Paeoniflorin; Radix Paeoniae Rubra.

Natural deep eutectic solvent (NaDES) is widely applied in the extraction of nutrients from natural resources as a greener alternative for fossil solvent. In the present work, 27 different NaDESs were screened for the extraction of paeoniflorin (PF) and galloyl paeoniflorin (GPF) from Radix Paeoniae Rubra (RPR). After screening and extraction parameter optimization, the extraction yields of PF and GPF reached up to 182.8 mg/g and 77.4 mg/g with the selected NaDES, ChCl-Sor. Furthermore, the antioxidant activity in vitro and neuroprotectivity in vivo of the ,ready-to-use, extracts were evaluated comprehensively. Especially in vivo, the cerebral ischemic/ reperfusion injury model was established in rats and the protective effects of the RPR extracts were determined The results not only proved that NaDES is a valuable green extraction media, but also indicated the safety and potential pharmaceutical application of NaDES based ,ready-to-use. extracts from medical plants.

Ultrasonics Sonochemistry published new progress about Alcohols Role: ANT (Analyte), BSU (Biological Study, Unclassified), ANST (Analytical Study), BIOL (Biological Study). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Zhao, Cong-Jun; Xue, Dong; Jia, Zhi-Hui; Wang, Chao; Xiao, Jianliang published the artcile< Methanol-promoted borylation of arylamines: a simple and green synthetic method to arylboronic acids and arylboronates>, Electric Literature of 112-63-0, the main research area is aryl boronic acid boronate preparation green chem; methanol promoted borylation arylamine Sandmeyer green chem.

A Sandmeyer borylation of arylamines via a SN2Ar pathway promoted by methanol with sodium nitrite and hydrochloric acid as diazotization agent has been developed, which provide a simple and green synthetic method to arylboronic acids and arylboronates.

Synlett published new progress about Aromatic amines Role: RCT (Reactant), RACT (Reactant or Reagent). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Electric Literature of 112-63-0.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Zhang, Jingjing; Yang, Jin-Dong; Zheng, Hanliang; Xue, Xiao-Song; Mayr, Herbert; Cheng, Jin-Pei published the artcile< Exploration of the Synthetic Potential of Electrophilic Trifluoromethylthiolating and Difluoromethylthiolating Reagents>, COA of Formula: C19H34O2, the main research area is trifluoromethylsulfenylation difluoromethylsulfenylation reagent electrophilicity; difluoromethylthiolation; electrophilicity; linear free-energy relationships; structure-reactivity relationships; trifluoromethylthiolation.

The electrophilicity parameters (E) of some trifluoromethylthiolating and difluoromethylthiolating reagents were determined by following the kinetics of their reactions with a series of enamines and carbanions with known nucleophilicity parameters (N, sN), using the linear free-energy relationship log k2=sN(N+E). The electrophilic reactivities of these reagents cover a range of 17 orders of magnitude, with Shen and Lu’s reagent (PhSO2)2NSCF3 being the most reactive and Billard’s reagent PhNMeSCF3 being the least reactive electrophile. While the observed electrophilic reactivities (E) of the amido-derived trifluoromethylthiolating reagents correlate well with the calculated Gibbs energies for heterolytic cleavage of the X-SCF3 bonds (Tt+DA), the cumol-derived reagents RCMe2OSCF3 (R = Ph, 2-IC6H4) are more reactive than expected from the thermodn. of the O-S cleavage. The E parameters of the tri/difluoromethylthiolating reagents derived in this work provide an ordering principle for their use in synthesis.

Angewandte Chemie, International Edition published new progress about Carbanions Role: PRP (Properties), RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, COA of Formula: C19H34O2.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Arumugam, S.; Baskar, S.; Sankara, Subramanian V.; Shivasankaran, G. published the artcile< Polyolester based lubricant from waste feedstock for sustainable environment: a tribological investigation>, Application of C19H34O2, the main research area is polyolester lubricant waste feedstock environment.

This study reported the tribol. evaluation of polyolester based lubricant synthesized from waste feedstock. The transesterification process was adopted for the formulation of lubricant from waste mango seed kernel oil. The polyols used in this formulation are neopentyl glycol, trimethylolpropane and pentaerythritol. The tribol. investigation was conducted using four ball tribometer as per ASTM D4172. The frictional and wear behavior of vegetable oil-based polyolester was analyzed in addition to the wear morphol. of investigated balls. The results indicated that the average frictional torque and mean wear diameter of pentaerythritol ester of waste mango seed oil was 0.12 Nm and 0.403 mm resp. and also found that the pentaerythritol ester showed improved tribol. results as compared with other polyolesters say neopentyl glycol ester and trimethylolpropane ester of waste mango seed oil. The waste mange seed oil is found suitable candidate for the formulation of polyolester based sustainable lubricant.

IOP Conference Series: Materials Science and Engineering published new progress about Environment. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Application of C19H34O2.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Tran, Chinh Hoang; Lee, Min Woong; Kim, Sun A.; Jang, Han Byul; Kim, Il published the artcile< Kinetic and Mechanistic Study of Heterogeneous Double Metal Cyanide-Catalyzed Ring-Opening Multibranching Polymerization of Glycidol>, Application of C19H34O2, the main research area is kinetics mechanistic metal cyanide catalyzed multibranching polymerization glycidol.

Polyglycidols of tunable degree of branching (DB) have been synthesized via ring-opening multibranching polymerization (ROMBP) of glycidol in the absence of any initiators using heterogeneous double metal cyanide (DMC) catalysts. Semi-branched polyglycidols of low DB (less than 0.3) are obtained using simple solvent-free batch polymerizations, whereas hyperbranched analogs of high DB (more than 0.5) are achieved employing semi-batch (or slow monomer addition) polymerizations The rate of DMC-catalyzed ROMBPs of glycidol shows the first-order dependences on monomer and catalyst concentrations, suggesting that the ROMBPs proceed via a coordinative mechanism. The formation of propagating species and the resultant microstructural units are clarified using a conversion vs. time anal. in the NMR-scale.

Macromolecules (Washington, DC, United States) published new progress about Branched polymers, hyperbranched dendritic polymers Role: PRP (Properties), SPN (Synthetic Preparation), PREP (Preparation). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Application of C19H34O2.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Yudasaka, Masaharu; Maruyama, Toshifumi; Yamaguchi, Eiji; Tada, Norihiro; Itoh, Akichika published the artcile< Synthesis, Characterization, and Reaction of a Both Inter- and Intramolecularly Coordinated Pseudocyclic Iodosylbenzene-Trifluoroacetic Acid Complexes>, HPLC of Formula: 112-63-0, the main research area is iodobenzene oxidation; iodosylbenzene trifluoroacetic acid comples preparation oxidant.

An ortho-substituted ether-oxygen-coordinated pseudocyclic iodosylbenzene-trifluoroacetic acid (pcISB-TFA) complex was synthesized and characterized by X-ray crystallog. anal. TFA suppresses the disproportionation by both coordination of the oxygen atom to the iodine(III) center through secondary bonding and by hydrogen bonding to the oxygen anion. This bench-stable reagent is highly soluble in common organic solvents and reacts with various organic substrates under mild reaction conditions to give the corresponding products in good yields.

European Journal of Organic Chemistry published new progress about Crystal structure. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, HPLC of Formula: 112-63-0.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Piffeteau, Annie; Gaudry, Michel published the artcile< Biotin uptake: influx, efflux and countertransport in Escherichia coli K12>, Related Products of 112-63-0, the main research area is biotin transport Escherichia.

Biotin uptake by E. coli K12 has been reinvestigated. The vitamin uptake is an active process depending on energy and inhibited by uncouplers. The kinetic parameters (Km = 0.27 μM, Vmax = 6.8 pmol/min/mg dry cells) are close to those previously determined for a biotin-dependent strain E. coli C162 (Piffeteau, A., et. al, 1982). By use of biotin p-nitrophenyl ester, an affinity label of the biotin transport system, it was shown, under conditions of steady state, that the efflux of biotin is not energy dependent and is mainly mediated by a diffusion mechanism. Reexamination of the regulation of the biotin transport by biotin, revealed that only 50% of the biotin uptake system is under control by the vitamin.

Biochimica et Biophysica Acta, Biomembranes published new progress about Biological transport. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Related Products of 112-63-0.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics